Optical lens assembly, image capturing apparatus and electronic device

ABSTRACT

An optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element has refractive power. The third lens element has refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being concave in a paraxial region thereof. The sixth lens element with refractive power has an object-side surface being concave in a paraxial region thereof. The seventh lens element with refractive power has an image-side surface being concave in a paraxial region thereof.

RELATED APPLICATIONS

The present application is a continuation of the application Ser. No.17/001,901, filed Aug. 25, 2020, which is a continuation of theapplication Ser. No. 16/596,900, filed Oct. 9, 2019, now U.S. Pat. No.10,788,650 issued on Sep. 29, 2020, which is a continuation of theapplication Ser. No. 16/161,403, filed Oct. 16, 2018, now U.S. Pat. No.10,481,368 issued on Nov. 19, 2019, which is a continuation of theapplication Ser. No. 15/582,843, filed May 1, 2017, now U.S. Pat. No.10,133,033 issued on Nov. 20, 2018, which is a continuation of theapplication Ser. No. 14/788,046, filed Jun. 30, 2015, now U.S. Pat. No.9,671,591 issued on Jun. 6, 2017, and claims priority to Taiwanapplication serial number 104112263, filed Apr. 16, 2015, the entirecontents of which are hereby incorporated herein by reference.

BACKGROUND Technical Field

The present disclosure relates to an optical lens assembly and an imagecapturing apparatus. More particularly, the present disclosure relatesto a compact optical lens assembly and an image capturing apparatuswhich is applicable to electronic devices.

Description of Related Art

In recent years, with the popularity of mobile terminals having camerafunctionalities, the demand of miniaturized optical systems has beenincreasing. The sensor of a conventional optical system is typically aCCD (Charge-Coupled Device) or a CMOS (ComplementaryMetal-Oxide-Semiconductor) sensor. As the advanced semiconductormanufacturing technologies have allowed the pixel size of sensors to bereduced and compact optical systems have gradually evolved toward thefield of higher megapixels, there is an increasing demand for compactoptical systems featuring better image quality.

A conventional optical system employed in electronic devices mainlyadopts four-element or five-element lens structures. As the popularitiesof smart phones and portable devices are growing, the optical systemstrend to large image area and compact size, and the image capturingapparatus should be also correspondingly compact in size. However, theconventional optical systems cannot satisfy the requirement of bothlarge aperture and short total track length so as difficult to apply tocompact electronic devices.

Other conventional compact optical systems with six-element lensstructure are also developed. However, the product with large apertureand short total track length usually has poor surface shape so as tocause the problems of curved image, severe distortion and insufficientrelative illumination.

SUMMARY

According to one aspect of the present disclosure, an optical lensassembly includes, in order from an object side to an image side, afirst lens element, a second lens element, a third lens element, afourth lens element, a fifth lens element, a sixth lens element and aseventh lens element. The first lens element with positive refractivepower has an object-side surface being convex in a paraxial regionthereof. The second lens element has refractive power. The third lenselement has refractive power. The fourth lens element has refractivepower. The fifth lens element with refractive power has an image-sidesurface being concave in a paraxial region thereof. The sixth lenselement with refractive power has an object-side surface being concavein a paraxial region thereof, wherein the object-side surface and animage-side surface of the sixth lens element are aspheric. The seventhlens element with refractive power has an image-side surface beingconcave in a paraxial region thereof, wherein an object-side surface andthe image-side surface of the seventh lens element are aspheric, and theimage-side surface of the seventh lens element includes at least oneconvex shape in an off-axial region thereof. The optical lens assemblyhas a total of seven lens elements with refractive power. There is anair gap between every two of the first lens element, the second lenselement, the third lens element, the fourth lens element, the fifth lenselement, the sixth lens element and the seventh lens element that areadjacent to each other. When a curvature radius of the object-sidesurface of the sixth lens element is R11, and a focal length of theoptical lens assembly is f, the following condition is satisfied:

R11/f<0.

According to another aspect of the present disclosure, an imagecapturing apparatus includes the optical lens assembly according to theaforementioned aspect and an image sensor, wherein the image sensor isdisposed on an image surface of the optical lens assembly.

According to another aspect of the present disclosure, an electronicdevice includes the image capturing apparatus according to the foregoingaspect.

According to another aspect of the present disclosure, an optical lensassembly includes, in order from an object side to an image side, afirst lens element, a second lens element, a third lens element, afourth lens element, a fifth lens element, a sixth lens element and aseventh lens element. The first lens element with positive refractivepower has an object-side surface being convex in a paraxial regionthereof. The second lens element has refractive power. The third lenselement has refractive power. The fourth lens element has refractivepower. The fifth lens element with refractive power has an image-sidesurface being concave in a paraxial region thereof. The sixth lenselement with refractive power has an image-side surface being convex ina paraxial region thereof. The seventh lens element with refractivepower has an image-side surface being concave in a paraxial regionthereof, wherein an object-side surface and the image-side surface ofthe seventh lens element are aspheric, and the image-side surface of theseventh lens element includes at least one convex shape in an off-axialregion thereof. The optical lens assembly has a total of seven lenselements with refractive power. There is an air gap between every two ofthe first lens element, the second lens element, the third lens element,the fourth lens element, the fifth lens element, the sixth lens elementand the seventh lens element that are adjacent to each other.

According to another aspect of the present disclosure, an imagecapturing apparatus includes the optical lens assembly according to theaforementioned aspect and an image sensor, wherein the image sensor isdisposed on an image surface of the optical lens assembly.

According to another aspect of the present disclosure, an electronicdevice includes the image capturing apparatus according to the foregoingaspect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of an image capturing apparatus according tothe 1st embodiment of the present disclosure;

FIG. 2 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing apparatus according to the 1stembodiment;

FIG. 3 is a schematic view of an image capturing apparatus according tothe 2nd embodiment of the present disclosure;

FIG. 4 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing apparatus according to the 2ndembodiment;

FIG. 5 is a schematic view of an image capturing apparatus according tothe 3rd embodiment of the present disclosure;

FIG. 6 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing apparatus according to the 3rdembodiment;

FIG. 7 is a schematic view of an image capturing apparatus according tothe 4th embodiment of the present disclosure;

FIG. 8 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing apparatus according to the 4thembodiment;

FIG. 9 is a schematic view of an image capturing apparatus according tothe 5th embodiment of the present disclosure;

FIG. 10 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing apparatus according to the 5thembodiment;

FIG. 11 is a schematic view of an image capturing apparatus according tothe 6th embodiment of the present disclosure;

FIG. 12 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing apparatus according to the 6thembodiment;

FIG. 13 shows a schematic view of the parameter Sag52 of the opticallens assembly of the image capturing apparatus according to FIG. 1;

FIG. 14 shows a schematic view of the parameter Yc32 of the optical lensassembly of the image capturing apparatus according to FIG. 3;

FIG. 15 shows a schematic view of the parameter Yc72 of the optical lensassembly of the image capturing apparatus according to FIG. 3;

FIG. 16 shows an electronic device according to the 7th embodiment ofthe present disclosure;

FIG. 17 shows an electronic device according to the 8th embodiment ofthe present disclosure; and

FIG. 18 shows an electronic device according to the 9th embodiment ofthe present disclosure.

DETAILED DESCRIPTION

An optical lens assembly includes, in order from an object side to animage side, a first lens element, a second lens element, a third lenselement, a fourth lens element, a fifth lens element, a sixth lenselement and a seventh lens element. The optical lens assembly has atotal of seven lens elements with refractive power.

According to the optical lens assembly of the present disclosure, thereis an air gap between every two of the first lens element, the secondlens element, the third lens element, the fourth lens element, the fifthlens element, the sixth lens element and the seventh lens element thatare adjacent to each other, that is, each of the first through seventhlens elements of the optical lens assembly is a single and non-cementedlens element. Moreover, the manufacturing process of the cemented lensesis more complex than the non-cemented lenses. In particular, cementedsurfaces of lens elements need to have accurate curvature to ensure twolens elements will be highly cemented. However, during the cementingprocess, those two lens elements might not be highly cemented due todisplacement and it is thereby not favorable for the image quality ofthe optical lens assembly. Therefore, there is an air gap between everytwo of the first lens element, the second lens element, the third lenselement, the fourth lens element, the fifth lens element, the sixth lenselement and the seventh lens element that are adjacent to each other inthe present disclosure for resolving the problem generated by thecemented lens elements.

The first lens element with positive refractive power has an object-sidesurface being convex in a paraxial region thereof. Therefore, it isfavorable for properly adjusting the positive refractive power so as toreduce the total track length of the optical lens assembly.

The third lens element can have an image-side surface being concave in aparaxial region thereof, and the image-side surface of the third lenselement can include at least one convex shape in an off-axial regionthereof. Therefore, it is favorable for effectively correcting theoff-axial aberration.

The fourth lens element can have an object-side surface being convex ina paraxial region thereof. Therefore, it is favorable for correcting thespherical aberration so as to improve the image quality.

The fifth lens element has an image-side surface being concave in aparaxial region thereof. Therefore, it is favorable for obtaining anoptimized surface shape so as to enlarge the aperture and the field ofview.

The sixth lens element can have an object-side surface being concave ina paraxial region thereof and have an image-side surface being convex ina paraxial region thereof. Therefore, it is favorable for effectivelycorrecting the astigmatism so as to improve the image quality.

The seventh lens element has an image-side surface being concave in aparaxial region thereof, and the image-side surface of the seventh lenselement includes at least one convex shape in an off-axial regionthereof. Therefore, it is favorable for effectively reducing theincident angle of the off-axis on the image sensor so as to improve thephotosensitivity, the image quality in the peripheral region and therelative illumination of the optical lens assembly.

When a curvature radius of the object-side surface of the sixth lenselement is R11, and a focal length of the optical lens assembly is f,the following condition is satisfied: R11/f<0. Therefore, it isfavorable for the optical lens assembly with large aperture and compactsize to reduce the curved image, obtain the proper relative illuminationand arrange the surface shape.

When an axial distance between the object-side surface of the first lenselement and the image-side surface of the seventh lens element is Td,and a sum of central thicknesses of the first lens element, the secondlens element, the third lens element, the fourth lens element, the fifthlens element, the sixth lens element and the seventh lens element isICT, the following condition is satisfied: 1.0<Td/ΣCT<1.45. Therefore,it is favorable for keeping compact among lens elements and preventingexcessive air gap between every two lens elements so as to reduce theassembling difficulty.

When an Abbe number of the second lens element is V2, and an Abbe numberof the fifth lens element is V5, the following condition is satisfied:30<V2+V5<85. Therefore, it is favorable for the distribution of negativerefractive power of the second lens element and the fifth lens elementso as to improve the image quality.

When a curvature radius of the image-side surface of the seventh lenselement is R14, and the focal length of the optical lens assembly is f,the following condition is satisfied: 0<R14/f<0.60. Therefore, it isfavorable for the principal point of the optical lens assembly beingpositioned away from the image side so as to reduce the back focallength and maintain the compact size.

When the focal length of the optical lens assembly is f, and a compositefocal length of the third lens element, the fourth lens element and thefifth lens element is f345, the following condition is satisfied:0<f/f345<1.0. Therefore, it is favorable for the moldability andassembling of the optical lens assembly by the moderate change of thesurface shape of the third lens element, the fourth lens element and thefifth lens element so as to obtain the arrangement of lowphotosensitivity and superior image.

When a distance in parallel with an optical axis from an axial vertex onthe image-side surface of the fifth lens element to a maximum effectiveradius position on the image-side surface of the fifth lens element isSag52, and a central thickness of the fifth lens element is CT5, thefollowing condition is satisfied: |Sag52|/CT5<0.55. Therefore, the shapeof the lens element would not be excessively curved, and it is favorablefor manufacturing, molding and obtaining a more compact arrangement ofthe optical lens assembly. Preferably, the following condition issatisfied: |Sag52|/CT5<0.50.

When a central thickness of the sixth lens element is CT6, and a centralthickness of the seventh lens element is CT7, the following condition issatisfied: CT6/CT7<2.50. Therefore, it is favorable for preventing thesixth lens element with excessive central thickness or the seventh lenselement with insufficient central thickness so as to avoid the weakstructure and reduce the difficulty of assembling.

The optical lens assembly can further include a stop, such as anaperture stop, disposed between an object and the third lens element.When an axial distance between the stop and the image-side surface ofthe seventh lens element is Sd, and the axial distance between theobject-side surface of the first lens element and the image-side surfaceof the seventh lens element is Td, the following condition is satisfied:0.80<Sd/Td<1.0. Therefore, it is favorable for balancing thetelecentricity and the wide field of view so as to reduce the totaltrack length and maintain the compact size.

When the axial distance between the object-side surface of the firstlens element and the image-side surface of the seventh lens element isTd, and an entrance pupil diameter of the optical lens assembly is EPD,the following condition is satisfied: Td/EPD<3.20. Therefore; it isfavorable for enhancing the exposure of the optical lens assembly andmaintaining the compact size.

When a vertical distance between a non-axial critical point closest toan image surface in an off-axis region on the image-side surface of thethird lens element and the optical axis is Yc32, and a vertical distancebetween a non-axial critical point closest to an image surface in anoff-axis region on the image-side surface of the seventh lens elementand the optical axis is Yc72, the following condition is satisfied:0.3<Yc32/Yc72<0.75. Therefore, it is favorable for convergence of thelight in the peripheral region of the image so as to improve therelative illumination and image clarity of the optical lens assembly.

When an axial distance between the object-side surface of the first lenselement and an image surface is TL, and a maximum image height of theoptical lens assembly is ImgH, the following condition is satisfied:TL/ImgH<1.80. Therefore, it is favorable for reducing the total tracklength of the optical lens assembly so as to maintain the compact size.

When the focal length of the optical lens assembly is f, and the maximumimage height of the optical lens assembly is ImgH, the followingcondition is satisfied: f/ImgH<1.40. Therefore, it is favorable forenlarging the field of view and reducing the distortion of the opticallens assembly.

When a half of a maximal field of view of the optical lens assembly isHFOV, the following condition is satisfied: 0.70<tan(HFOV). Therefore,it is favorable for obtaining a wide field of view so as to obtain awider imaging scene.

When a curvature radius of the object-side surface of the seventh lenselement is R13, and a curvature radius of the image-side surface of theseventh lens element is R14, the following condition is satisfied:0.30<(R13+R14)/(R13−R14). Therefore, it is favorable for reducing theback focal length so as to maintain the compact size.

According to the optical lens assembly of the present disclosure, thelens elements thereof can be made of plastic or glass material. When thelens elements are made of plastic material, the manufacturing cost canbe effectively reduced. When the lens elements are made of glassmaterial, the arrangement of the refractive power of the optical lensassembly may be more flexible to design. Furthermore, surfaces of eachlens element can be arranged to be aspheric, since the aspheric surfaceof the lens element is easy to form a shape other than spherical surfaceso as to have more controllable variables for eliminating the aberrationthereof, and to further decrease the required number of the lenselements. Therefore, the total track length of the optical lens assemblycan also be reduced.

According to the optical lens assembly of the present disclosure, eachof an object-side surface and an image-side surface has a paraxialregion and an off-axis region. The paraxial region refers to the regionof the surface where light rays travel close to the optical axis, andthe off-axis region refers to the region of the surface away from theparaxial region. Particularly unless otherwise specified, when the lenselement has a convex surface, it indicates that the surface is convex inthe paraxial region thereof; when the lens element has a concavesurface, it indicates that the surface is concave in the paraxial regionthereof. Furthermore, when the lens element has positive refractivepower or negative refractive power, it indicates that the lens elementhas refractive power in the paraxial region thereof. When the lenselement has a focal length, it indicates that the lens element has afocal length in the paraxial region thereof.

According to the optical lens assembly of the present disclosure, acritical point is a non-axial point of the lens surface where itstangent is perpendicular to the optical axis.

According to the optical lens assembly of the present disclosure, theoptical lens assembly can include at least one stop, such as an aperturestop, a glare stop or a field stop. The glare stop or the field stop isfor eliminating the stray light and thereby improving the imageresolution thereof.

According to the optical lens assembly of the present disclosure, theimage surface, depending on the corresponding image sensor, can be aplane surface or a curved surface with any curvature. When the imagesurface is a curved surface, it is particularly indicates a concavesurface toward the object side.

According to the optical lens assembly of the present disclosure, anaperture stop can be configured as a front stop or a middle stop. Afront stop disposed between an imaged object and the first lens elementcan provide a longer distance between an exit pupil of the optical lensassembly and the image surface and thereby improves the image-sensingefficiency of an image sensor. A middle stop disposed between the firstlens element and the image surface is favorable for enlarging the fieldof view of the optical lens assembly and thereby provides a wider fieldof view for the same.

According to the optical lens assembly of the present disclosure, theoptical lens assembly can be optionally applied to moving focus opticalsystems. Furthermore, the optical lens assembly is featured with goodcorrection ability and high image quality, and can be applied to 3D(three-dimensional) image capturing applications, in products such asdigital cameras, mobile devices, digital tablets, smart TVs, networkmonitoring devices, motion sensing input devices, driving recorders,rear view camera systems, wearable devices and other electronic imagingproducts.

According to the present disclosure, an image capturing apparatus isprovided. The image capturing apparatus includes the aforementionedoptical lens assembly according to the present disclosure and an imagesensor, wherein the image sensor is disposed on or near an image surfaceof the aforementioned optical lens assembly. In the optical lensassembly of the image capturing apparatus, it is favorable for obtaininglarge aperture and short total track length by the proper arrangement ofthe surface shape of the fifth lens element and the seventh lens elementso as to apply to the compact electronic devices. Moreover, thecurvature radius of the sixth lens element and the focal length of theoptical lens assembly are properly distributed, so that large apertureand compact size of the optical lens assembly can be maintained, thecurved image can be reduced effectively, the proper relativeillumination can be obtained and the surface shape can be arrangedproperly. Preferably, the image capturing apparatus can further includea barrel member, a holder member or a combination thereof.

According to the present disclosure, an electronic device is provided,wherein the electronic device includes the aforementioned imagecapturing apparatus. Therefore, it is favorable for obtaining a widerfield of view. Preferably, the electronic device can further include butnot limited to a control unit, a display, a storage unit, a randomaccess memory unit (RAM) or a combination thereof.

According to the above description of the present disclosure, thefollowing 1st-9th specific embodiments are provided for furtherexplanation.

1st Embodiment

FIG. 1 is a schematic view of an image capturing apparatus according tothe 1st embodiment of the present disclosure. FIG. 2 shows, in orderfrom left to right, spherical aberration curves, astigmatic field curvesand a distortion curve of the image capturing apparatus according to the1st embodiment. In FIG. 1, the image capturing apparatus includes theoptical lens assembly (its reference numeral is omitted) and an imagesensor 195. The optical lens assembly includes, in order from an objectside to an image side, an aperture stop 100, a first lens element 110, asecond lens element 120, a third lens element 130, a fourth lens element140, a fifth lens element 150, a sixth lens element 160, a seventh lenselement 170, an IR-cut filter 180 and an image surface 190. The imagesensor 195 is disposed on the image surface 190 of the optical lensassembly. The optical lens assembly has a total of seven lens elements(110-170) with refractive power. Moreover, there is an air gap on theoptical axis between every two of the first lens element 110, the secondlens element 120, the third lens element 130, the fourth lens element140, the fifth lens element 150, the sixth lens element 160 and theseventh lens element 170 that are adjacent to each other.

The first lens element 110 with positive refractive power has anobject-side surface 111 being convex in a paraxial region thereof and animage-side surface 112 being concave in a paraxial region thereof. Thefirst lens element 110 is made of plastic material and has theobject-side surface 111 and the image-side surface 112 being bothaspheric.

The second lens element 120 with negative refractive power has anobject-side surface 121 being convex in a paraxial region thereof and animage-side surface 122 being concave in a paraxial region thereof. Thesecond lens element 120 is made of plastic material and has theobject-side surface 121 and the image-side surface 122 being bothaspheric.

The third lens element 130 with positive refractive power has anobject-side surface 131 being convex in a paraxial region thereof and animage-side surface 132 being concave in a paraxial region thereof. Thethird lens element 130 is made of plastic material and has theobject-side surface 131 and the image-side surface 132 being bothaspheric.

The fourth lens element 140 with positive refractive power has anobject-side surface 141 being convex in a paraxial region thereof and animage-side surface 142 being convex in a paraxial region thereof. Thefourth lens element 140 is made of plastic material and has theobject-side surface 141 and the image-side surface 142 being bothaspheric.

The fifth lens element 150 with negative refractive power has anobject-side surface 151 being concave in a paraxial region thereof andan image-side surface 152 being concave in a paraxial region thereof.The fifth lens element 150 is made of plastic material and has theobject-side surface 151 and the image-side surface 152 being bothaspheric.

The sixth lens element 160 with positive refractive power has anobject-side surface 161 being concave in a paraxial region thereof andan image-side surface 162 being convex in a paraxial region thereof. Thesixth lens element 160 is made of plastic material and has theobject-side surface 161 and the image-side surface 162 being bothaspheric.

The seventh lens element 170 with negative refractive power has anobject-side surface 171 being convex in a paraxial region thereof and animage-side surface 172 being concave in a paraxial region thereof. Theseventh lens element 170 is made of plastic material and has theobject-side surface 171 and the image-side surface 172 being bothaspheric. Furthermore, the image-side surface 172 of the seventh lenselement 170 includes at least one convex shape in an off-axial regionthereof.

The IR-cut filter 180 is made of glass material and located between theseventh lens element 170 and the image surface 190, and will not affectthe focal length of the optical lens assembly.

The equation of the aspheric surface profiles of the aforementioned lenselements of the 1st embodiment is expressed as follows:

${{X(Y)} = {{\left( {Y^{2}/R} \right)/\left( {1 + {{sqrt}\left( {1 - {\left( {1 + k} \right) \times \left( {Y/R} \right)^{2}}} \right)}} \right)} + {\sum\limits_{i}{\left( {Ai} \right) \times \left( Y^{i} \right)}}}},$

where,

X is the relative distance between a point on the aspheric surfacespaced at a distance Y from the optical axis and the tangential plane atthe aspheric surface vertex on the optical axis;

Y is the vertical distance from the point on the aspheric surface to theoptical axis;

R is the curvature radius;

k is the conic coefficient; and

Ai is the i-th aspheric coefficient.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when a focal length of the optical lens assemblyis f, an f-number of the optical lens assembly is Fno, and half of amaximal field of view of the optical lens assembly is HFOV, theseparameters have the following values: f=5.04 mm; Fno=2.30; and HFOV=38.0degrees.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when a half of a maximal field of view of theoptical lens assembly is HFOV, the following condition is satisfied:tan(HFOV)=0.78.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when an Abbe number of the second lens element120 is V2, and an Abbe number of the fifth lens element 150 is V5, thefollowing condition is satisfied: V2+V5=79.3.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when an axial distance between the aperture stop100 and the image-side surface 172 of the seventh lens element 170 isSd, and the axial distance between the object-side surface 111 of thefirst lens element 110 and the image-side surface 172 of the seventhlens element 170 is Td, the following condition is satisfied:Sd/Td=0.95.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when the axial distance between the object-sidesurface 111 of the first lens element 110 and the image-side surface 172of the seventh lens element 170 is Td, and an entrance pupil diameter ofthe optical lens assembly is EPD, the following conditions is satisfied:Td/EPD=2.36.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when an axial distance between the object-sidesurface 111 of the first lens element 110 and the image-side surface 172of the seventh lens element 170 is Td, a central thickness of the firstlens element 110 is CT1, a central thickness of the second lens element120 is CT2, a central thickness of the third lens element 130 is CT3, acentral thickness of the fourth lens element 140 is CT4, a centralthickness of the fifth lens element 150 is CT5, a central thickness ofthe sixth lens element 160 is CT6, a central thickness of the seventhlens element 170 is CT7, and a sum of central thicknesses of the firstlens element 110, the second lens element 120, the third lens element130, the fourth lens element 140, the fifth lens element 150, the sixthlens element 160 and the seventh lens element 170 is ΣCT(ΣCT=CT1+CT2+CT3+CT4+CT5+CT6+CT7), the following condition is satisfied:Td/ΣCT=1.37.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when the central thickness of the sixth lenselement 160 is CT6, and the central thickness of the seventh lenselement 170 is CT7, the following condition is satisfied: CT6/CT7=0.42.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when an axial distance between the object-sidesurface 111 of the first lens element 110 and the image surface 190 isTL, and a maximum image height of the optical lens assembly (half of adiagonal length of an effective photosensitive area of the image sensor195) is ImgH, the following condition is satisfied: TL/ImgH=1.61.

FIG. 13 shows a schematic view of the parameter Sag52 of the opticallens assembly of the image capturing apparatus according to FIG. 1. InFIG. 13, when a distance in parallel with the optical axis from an axialvertex on the image-side surface 152 of the fifth lens element 150 to amaximum effective radius position on the image-side surface 152 of thefifth lens element 150 is Sag52 (Sag52 is a negative value with thedistance in parallel with the optical axis towards the object side;Sag52 is a positive value with the distance in parallel with the opticalaxis towards the image side.), and the central thickness of the fifthlens element 150 is CT5, the following condition is satisfied:|Sag52|/CT5=0.91.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when a curvature radius of the object-sidesurface 161 of the sixth lens element 160 is R11, and the focal lengthof the optical lens assembly is f, the following condition is satisfied:R11/f=−19.16.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when a curvature radius of the image-side surface172 of the seventh lens element 170 is R14, and the focal length of theoptical lens assembly is f, the following condition is satisfied:R14/f=0.32.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when a curvature radius of the object-sidesurface 171 of the seventh lens element 170 is R13, and the curvatureradius of the image-side surface 172 of the seventh lens element 170 isR14, the following condition is satisfied: (R13+R14)/(R13−R14)=4.89.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when the focal length of the optical lensassembly is f, and a composite focal length of the third lens element130, the fourth lens element 140 and the fifth lens element 150 is f345,the following condition is satisfied: f/f345=0.17.

In the optical lens assembly of the image capturing apparatus accordingto the 1st embodiment, when the focal length of the optical lensassembly is f, and the maximum image height of the optical lens assemblyis ImgH, the following condition is satisfied: f/ImgH=1.26.

The detailed optical data of the 1st embodiment are shown in TABLE 1 andthe aspheric surface data are shown in TABLE 2 below.

TABLE 1 1st Embodiment f = 5.04 mm, Fno = 2.30, HFOV = 38.0 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.284   2 Lens 1 2.233 ASP 0.530Plastic 1.544 55.9 4.69 3 16.435 ASP 0.227 4 Lens 2 5.991 ASP 0.250Plastic 1.639 23.5 −6.49 6 2.411 ASP 0.097 6 Lens 3 2.758 ASP 0.303Plastic 1.514 56.8 24.75 7 3.391 ASP 0.429 8 Lens 4 13.374 ASP 0.690Plastic 1.544 55.9 7.16 9 −5.402 ASP 0.209 10 Lens 5 −3.495 ASP 0.320Plastic 1.530 55.8 −6.36 11 96.963 ASP 0.095 12 Lens 6 −96.573 ASP 0.494Plastic 1.544 55.9 9.58 13 −4.955 ASP 0.355 14 Lens 7 2.407 ASP 1.182Plastic 1.544 55.9 −17.53 15 1.590 ASP 0.750 16 IR-cut filter Plano0.175 Glass 1.517 64.2 — 17 Plano 0.354 18 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 2 Aspheric Coefficients Surface # 2 3 4 5 6 7 8 k= −1.6248E+005.0000E+00 −7.6836E+00 −1.0000E+00  8.1379E−01  1.7725E+00 −1.0000E+00A4=  2.0019E−02 −5.5157E−03  −2.7241E−02 −2.5240E−02 −5.5024E−02−5.3487E−02 −2.6883E−02 A6=  4.3467E−03 8.5284E−03  7.0085E−03 1.2755E−02  2.7296E−02  2.0228E−02 −2.9367E−03 A8= −2.6553E−03−1.2728E−02  −1.1189E−02 −5.2120E−03 −2.5116E−02 −1.3427E−02 −1.7395E−02A10=  1.1450E−03 6.5279E−03  9.6814E−03 −2.9593E−03  1.6585E−02 4.8958E−03  2.9617E−02 A12=  6.2147E−04 2.1245E−03 −3.0487E−03 7.1527E−03 −9.6047E−03 −3.9492E−04 −2.6905E−02 A14= −1.3952E−04−2.8374E−03  −3.5311E−04 −3.7546E−03  5.2744E−03  5.5970E−04  1.1653E−02A16= −2.4138E−04 3.2642E−04  5.2475E−05  6.8686E−04 −1.1018E−03−1.0316E−04 −1.7876E−03 Surface # 9 10 11 12 13 14 15 k= −2.1444E+002.9289E−01 5.0000E+00 −2.0000E+01  1.5583E+00 −1.0000E+01 −3.4838E+00A4= −9.3886E−03 2.7878E−02 1.0192E−01  1.1933E−01 −8.8084E−02−1.1814E−01 −5.7233E−02 A6= −2.7477E−02 −8.1762E−02  −1.3693E−01 −1.0169E−01  9.5755E−02  3.5112E−02  1.7202E−02 A8=  1.6418E−029.5940E−02 6.9012E−02  3.7754E−02 −4.7483E−02 −5.1941E−03 −3.3887E−03A10= −8.1849E−03 −6.1399E−02  −1.9060E−02  −8.4802E−03  1.3772E−02 4.5049E−04  4.2121E−04 A12=  2.1391E−03 2.3015E−02 2.8526E−03 9.5315E−04 −2.3052E−03 −2.2847E−05 −3.2408E−05 A14= −1.9905E−04−4.6577E−03  −1.8693E−04  −1.0509E−05  2.0603E−04  6.1129E−07 1.4002E−06 A16=  3.9771E−05 3.8835E−04 9.4522E−07 −4.4244E−06−7.6055E−06 −6.7107E−09 −2.5728E−08

In TABLE 1, the curvature radius, the thickness and the focal length areshown in millimeters (mm). Surface numbers 0-18 represent the surfacessequentially arranged from the object-side to the image-side along theoptical axis. In TABLE 2, k represents the conic coefficient of theequation of the aspheric surface profiles. A4-A16 represent the asphericcoefficients ranging from the 4th order to the 16th order. The tablespresented below for each embodiment are the corresponding schematicparameter and aberration curves, and the definitions of the tables arethe same as TABLE 1 and TABLE 2 of the 1st embodiment. Therefore, anexplanation in this regard will not be provided again.

2nd Embodiment

FIG. 3 is a schematic view of an image capturing apparatus according tothe 2nd embodiment of the present disclosure. FIG. 4 shows, in orderfrom left to right, spherical aberration curves, astigmatic field curvesand a distortion curve of the image capturing apparatus according to the2nd embodiment. In FIG. 3, the image capturing apparatus includes theoptical lens assembly (its reference numeral is omitted) and an imagesensor 295. The optical lens assembly includes, in order from an objectside to an image side, an aperture stop 200, a first lens element 210, asecond lens element 220, a third lens element 230, a fourth lens element240, a fifth lens element 250, a sixth lens element 260, a seventh lenselement 270, an IR-cut filter 280 and an image surface 290. The imagesensor 295 is disposed on the image surface 290 of the optical lensassembly. The optical lens assembly has a total of seven lens elements(210-270) with refractive power. Moreover, there is an air gap on theoptical axis between every two of the first lens element 210, the secondlens element 220, the third lens element 230, the fourth lens element240, the fifth lens element 250, the sixth lens element 260 and theseventh lens element 270 that are adjacent to each other.

The first lens element 210 with positive refractive power has anobject-side surface 211 being convex in a paraxial region thereof and animage-side surface 212 being concave in a paraxial region thereof. Thefirst lens element 210 is made of plastic material and has theobject-side surface 211 and the image-side surface 212 being bothaspheric.

The second lens element 220 with positive refractive power has anobject-side surface 221 being convex in a paraxial region thereof and animage-side surface 222 being concave in a paraxial region thereof. Thesecond lens element 220 is made of plastic material and has theobject-side surface 221 and the image-side surface 222 being bothaspheric.

The third lens element 230 with positive refractive power has anobject-side surface 231 being convex in a paraxial region thereof and animage-side surface 232 being concave in a paraxial region thereof. Thethird lens element 230 is made of plastic material and has theobject-side surface 231 and the image-side surface 232 being bothaspheric.

The fourth lens element 240 with positive refractive power has anobject-side surface 241 being convex in a paraxial region thereof and animage-side surface 242 being convex in a paraxial region thereof. Thefourth lens element 240 is made of plastic material and has theobject-side surface 241 and the image-side surface 242 being bothaspheric.

The fifth lens element 250 with negative refractive power has anobject-side surface 251 being concave in a paraxial region thereof andan image-side surface 252 being concave in a paraxial region thereof.The fifth lens element 250 is made of plastic material and has theobject-side surface 251 and the image-side surface 252 being bothaspheric.

The sixth lens element 260 with positive refractive power has anobject-side surface 261 being convex in a paraxial region thereof and animage-side surface 262 being convex in a paraxial region thereof. Thesixth lens element 260 is made of plastic material and has theobject-side surface 261 and the image-side surface 262 being bothaspheric.

The seventh lens element 270 with negative refractive power has anobject-side surface 271 being concave in a paraxial region thereof andan image-side surface 272 being concave in a paraxial region thereof.The seventh lens element 270 is made of plastic material and has theobject-side surface 271 and the image-side surface 272 being bothaspheric. Furthermore, the image-side surface 272 of the seventh lenselement 270 includes at least one convex shape in an off-axial regionthereof.

The IR-cut filter 280 is made of glass material and located between theseventh lens element 270 and the image surface 290, and will not affectthe focal length of the optical lens assembly.

FIG. 14 shows a schematic view of the parameter Yc32 of the optical lensassembly of the image capturing apparatus according to FIG. 3. FIG. 15shows a schematic view of the parameter Yc72 of the optical lensassembly of the image capturing apparatus according to FIG. 3. In FIG.14 and FIG. 15, when a vertical distance between a non-axial criticalpoint closest to an image surface in an off-axis region on theimage-side surface 232 of the third lens element 230 and the opticalaxis is Yc32, and a vertical distance between a non-axial critical pointclosest to an image surface in an off-axis region on the image-sidesurface 272 of the seventh lens element 270 and the optical axis isYc72, the following condition is satisfied: Yc32/Yc72=0.54.

The detailed optical data of the 2nd embodiment are shown in TABLE 3 andthe aspheric surface data are shown in TABLE 4 below.

TABLE 3 2nd Embodiment f = 4.65 mm, Fno = 2.15, HFOV= 40.4 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.150   2 Lens 1 2.960 ASP 0.420Plastic 1.514 56.8 38.87 3 3.307 ASP 0.084 4 Lens 2 6.630 ASP 0.278Plastic 1.544 55.9 14.03 5 49.712 ASP 0.056 6 Lens 3 2.444 ASP 0.416Plastic 1.544 55.9 162.13 7 2.363 ASP 0.160 8 Lens 4 7.569 ASP 0.563Plastic 1.544 55.9 4.73 9 −3.800 ASP 0.123 10 Lens 5 −2.969 ASP 0.528Plastic 1.639 23.5 −4.47 11 82.403 ASP 0.231 12 Lens 6 9.510 ASP 1.250Plastic 1.530 55.8 2.99 13 −1.815 ASP 0.591 14 Lens 7 −7.522 ASP 0.600Plastic 1.514 56.8 −2.89 15 1.898 ASP 0.840 16 IR-cut filter Plano 0.300Glass 1.517 64.2 — 17 Plano 0.166 18 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 4 Aspheric Coefficients Surface # 2 3 4 5 6 7 8 k= −2.0939E+00−2.0905E+01 0.0000E+00 −1.0000E+00 −3.2092E+00 −1.9526E+00 −2.0000E+01A4= −2.0747E−02 −1.0411E−01 −1.4083E−01  −1.4779E−02 −2.0131E−02−5.4365E−02 −2.3983E−02 A6=  2.0940E−02  4.2868E−02 9.7817E−02 2.6894E−02 −1.6975E−02  5.4301E−03 −5.4118E−03 A8= −9.3997E−03−1.1417E−02 −3.8791E−02  −2.7733E−02 −2.6216E−03 −1.0637E−02  1.3182E−03A10= −1.2853E−02 −3.2821E−03 5.1750E−03  9.4238E−03 −2.8438E−03−3.5097E−04 −1.9507E−03 A12=  1.6050E−02  1.6226E−02 1.0680E−02−2.3576E−03 −9.7462E−04 A14= −5.5323E−03 −8.0878E−03 −5.4479E−03  5.2035E−04  6.4967E−04 Surface # 9 10 11 12 13 14 15 k= −2.0000E+01 −4.8158E−01 −1.0000E+00 5.7184E+00 −3.6113E+00 −1.1322E+00 −4.1978E+00A4= 1.4025E−02  9.6309E−02  1.0726E−02 −3.9919E−02  −2.0581E−02−4.2234E−02 −4.1540E−02 A6= −4.8831E−02  −1.1749E−01 −3.1344E−021.3514E−02 −3.9567E−03 −1.5286E−02  8.4931E−03 A8= 7.8545E−03 6.8594E−02  2.1783E−02 −6.3259E−03   6.5876E−03  1.5168E−02 −9.7493E−04A10= 9.6945E−04 −2.7529E−02 −7.2931E−03 1.1799E−03 −2.4765E−03−4.7729E−03  4.2854E−05 A12= 7.6967E−05  8.2703E−03  1.6429E−038.7374E−05  3.5230E−04  6.7202E−04  3.8335E−07 A14= 2.1061E−04−1.0879E−03 −1.8773E−04 −3.5512E−05  −8.3722E−06 −3.4864E−05 −5.8223E−08

In the 2nd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 2nd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 3 and TABLE 4 asthe following values and satisfy the following conditions:

2nd Embodiment f (mm) 4.65 TL/ImgH 1.65 Fno 2.15 |Sag52|/CT5 0.11 HFOV(deg.) 40.4 Yc32/Yc72 0.54 tan(HFOV) 0.85 R11/f 2.05 V2 + V5 79.4 R14/f0.41 Sd/Td 0.97 (R13 + R14)/(R13 − R14) 0.60 Td/EPD 2.45 f/f345 0.03Td/ΣCT 1.31 f/ImgH 1.16 CT6/CT7 2.08

3rd Embodiment

FIG. 5 is a schematic view of an image capturing apparatus according tothe 3rd embodiment of the present disclosure. FIG. 6 shows, in orderfrom left to right, spherical aberration curves, astigmatic field curvesand a distortion curve of the image capturing apparatus according to the3rd embodiment. In FIG. 5, the image capturing apparatus includes theoptical lens assembly (its reference numeral is omitted) and an imagesensor 395. The optical lens assembly includes, in order from an objectside to an image side, an aperture stop 300, a first lens element 310, asecond lens element 320, a third lens element 330, a fourth lens element340, a fifth lens element 350, a sixth lens element 360, a seventh lenselement 370, an IR-cut filter 380 and an image surface 390. The imagesensor 395 is disposed on the image surface 390 of the optical lensassembly. The optical lens assembly has a total of seven lens elements(310-370) with refractive power. Moreover, there is an air gap on theoptical axis between every two of the first lens element 310, the secondlens element 320, the third lens element 330, the fourth lens element340, the fifth lens element 350, the sixth lens element 360 and theseventh lens element 370 that are adjacent to each other.

The first lens element 310 with positive refractive power has anobject-side surface 311 being convex in a paraxial region thereof and animage-side surface 312 being concave in a paraxial region thereof. Thefirst lens element 310 is made of plastic material and has theobject-side surface 311 and the image-side surface 312 being bothaspheric.

The second lens element 320 with positive refractive power has anobject-side surface 321 being convex in a paraxial region thereof and animage-side surface 322 being concave in a paraxial region thereof. Thesecond lens element 320 is made of plastic material and has theobject-side surface 321 and the image-side surface 322 being bothaspheric.

The third lens element 330 with positive refractive power has anobject-side surface 331 being convex in a paraxial region thereof and animage-side surface 332 being concave in a paraxial region thereof. Thethird lens element 330 is made of plastic material and has theobject-side surface 331 and the image-side surface 332 being bothaspheric.

The fourth lens element 340 with positive refractive power has anobject-side surface 341 being convex in a paraxial region thereof and animage-side surface 342 being convex in a paraxial region thereof. Thefourth lens element 340 is made of plastic material and has theobject-side surface 341 and the image-side surface 342 being bothaspheric.

The fifth lens element 350 with negative refractive power has anobject-side surface 351 being concave in a paraxial region thereof andan image-side surface 352 being concave in a paraxial region thereof.The fifth lens element 350 is made of plastic material and has theobject-side surface 351 and the image-side surface 352 being bothaspheric.

The sixth lens element 360 with positive refractive power has anobject-side surface 361 being concave in a paraxial region thereof andan image-side surface 362 being convex in a paraxial region thereof. Thesixth lens element 360 is made of plastic material and has theobject-side surface 361 and the image-side surface 362 being bothaspheric.

The seventh lens element 370 with negative refractive power has anobject-side surface 371 being concave in a paraxial region thereof andan image-side surface 372 being concave in a paraxial region thereof.The seventh lens element 370 is made of plastic material and has theobject-side surface 371 and the image-side surface 372 being bothaspheric. Furthermore, the image-side surface 372 of the seventh lenselement 370 includes at least one convex shape in an off-axial regionthereof.

The JR-cut filter 380 is made of glass material and located between theseventh lens element 370 and the image surface 390, and will not affectthe focal length of the optical lens assembly.

The detailed optical data of the 3rd embodiment are shown in TABLE 5 andthe aspheric surface data are shown in TABLE 6 below.

TABLE 5 3rd Embodiment f = 4.64 mm, Fno = 2.00, HFOV = 41.0 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.183   2 Lens 1 2.968 ASP 0.434Plastic 1.514 56.8 85.93 3 3.023 ASP 0.076 4 Lens 2 7.126 ASP 0.275Plastic 1.544 55.9 14.55 5 67.767 ASP 0.050 6 Lens 3 2.287 ASP 0.442Plastic 1.544 55.9 117.88 7 2.209 ASP 0.166 8 Lens 4 6.388 ASP 0.565Plastic 1.544 55.9 3.84 9 −3.030 ASP 0.050 10 Lens 5 −4.074 ASP 0.476Plastic 1.639 23.5 −4.36 11 9.481 ASP 0.334 12 Lens 6 −34.556 ASP 1.234Plastic 1.530 55.8 3.02 13 −1.553 ASP 0.562 14 Lens 7 −25.506 ASP 0.600Plastic 1.514 56.8 −2.70 15 1.484 ASP 0.840 16 IR-cut filter Plano 0.300Glass 1.519 64.2 — 17 Plano 0.197 18 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 6 Aspheric Coefficients Surface # 2 3 4 5 6 7 8 k= −2.9875E+00−1.8419E+01 0.0000E+00 −1.0000E+00 −3.2732E+00 −1.4055E+00  2.9726E+00A4= −2.1311E−02 −1.0748E−01 −1.3486E−01  −6.9456E−03 −1.9888E−02−5.0154E−02 −1.8421E−02 A6=  3.0511E−02  4.6144E−02 9.7600E−02 2.5899E−02 −1.6587E−02  7.4581E−03  8.4578E−04 A8= −2.0597E−02−1.3045E−02 −3.3164E−02  −2.4166E−02 −3.8105E−03 −1.0094E−02 −1.6620E−03A10= −8.7742E−03 −2.7408E−03 2.2853E−03  8.1611E−03 −1.3410E−04−6.9773E−04 −3.3565E−03 A12=  1.6050E−02  1.6226E−02 1.0680E−02−2.3576E−03 −1.1178E−03 A14= −5.5323E−03 −8.0878E−03 −5.4479E−03  5.2035E−04  7.5884E−04 Surface # 9 10 11 12 13 14 15 k= −2.0000E+01 9.8256E−01 −1.0000E+00 3.0000E+00 −4.0027E+00 −1.1322E+00 −5.7862E+00A4= 3.0852E−02 8.6396E−02 −7.4135E−03 2.3096E−02 −1.5001E−02 −4.9004E−02−2.5015E−02 A6= −5.4531E−02  −1.1576E−01  −2.6931E−02 −3.9596E−02 −7.0085E−03  2.6225E−03  3.1451E−03 A8= 7.1141E−03 6.9426E−02 2.1329E−02 2.4146E−02  5.9306E−03 −8.0242E−04 −1.9846E−04 A10=1.0817E−03 −2.7804E−02  −7.4233E−03 −1.2448E−02  −2.5159E−03  6.3336E−04−1.2509E−05 A12= 1.8454E−04 8.0448E−03  1.6331E−03 3.6069E−03 3.7442E−04 −1.5799E−04  1.9163E−06 A14= 1.6806E−04 −1.0220E−03 −1.7639E−04 −3.7790E−04   1.8537E−06  1.3257E−05 −5.8223E−08

In the 3rd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment andthe 2nd embodiment with corresponding values for the 3rd embodiment, soan explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 5 and TABLE 6 asthe following values and satisfy the following conditions:

3rd Embodiment f (mm) 4.64 TL/ImgH 1.61 Fno 2.00 |Sag52|/CT6 0.22 HFOV(deg.) 41.0 Yc32/Yc72 0.58 tan(HFOV) 0.87 R11/f −7.45 V2 + V5 79.4 R14/f0.32 Sd/Td 0.97 (R13 + R14)/(R13 − R14) 0.89 Td/EPD 2.27 f/f345 0.24Td/ΣCT 1.31 f/ImgH 1.13 CT6/CT7 2.06

4th Embodiment

FIG. 7 is a schematic view of an image capturing apparatus according tothe 4th embodiment of the present disclosure. FIG. 8 shows, in orderfrom left to right, spherical aberration curves, astigmatic field curvesand a distortion curve of the image capturing apparatus according to the4th embodiment. In FIG. 7, the image capturing apparatus includes theoptical lens assembly (its reference numeral is omitted) and an imagesensor 495. The optical lens assembly includes, in order from an objectside to an image side, an aperture stop 400, a first lens element 410, asecond lens element 420, a third lens element 430, a fourth lens element440, a fifth lens element 450, a sixth lens element 460, a seventh lenselement 470, an IR-cut filter 480 and an image surface 490. The imagesensor 495 is disposed on the image surface 490 of the optical lensassembly. The optical lens assembly has a total of seven lens elements(410-470) with refractive power. Moreover, there is an air gap on theoptical axis between every two of the first lens element 410, the secondlens element 420, the third lens element 430, the fourth lens element440, the fifth lens element 450, the sixth lens element 460 and theseventh lens element 470 that are adjacent to each other.

The first lens element 410 with positive refractive power has anobject-side surface 411 being convex in a paraxial region thereof and animage-side surface 412 being concave in a paraxial region thereof. Thefirst lens element 410 is made of plastic material and has theobject-side surface 411 and the image-side surface 412 being bothaspheric.

The second lens element 420 with negative refractive power has anobject-side surface 421 being convex in a paraxial region thereof and animage-side surface 422 being concave in a paraxial region thereof. Thesecond lens element 420 is made of plastic material and has theobject-side surface 421 and the image-side surface 422 being bothaspheric.

The third lens element 430 with positive refractive power has anobject-side surface 431 being convex in a paraxial region thereof and animage-side surface 432 being concave in a paraxial region thereof. Thethird lens element 430 is made of plastic material and has theobject-side surface 431 and the image-side surface 432 being bothaspheric.

The fourth lens element 440 with positive refractive power has anobject-side surface 441 being convex in a paraxial region thereof and animage-side surface 442 being convex in a paraxial region thereof. Thefourth lens element 440 is made of plastic material and has theobject-side surface 441 and the image-side surface 442 being bothaspheric.

The fifth lens element 450 with negative refractive power has anobject-side surface 451 being concave in a paraxial region thereof andan image-side surface 452 being concave in a paraxial region thereof.The fifth lens element 450 is made of plastic material and has theobject-side surface 451 and the image-side surface 452 being bothaspheric.

The sixth lens element 460 with positive refractive power has anobject-side surface 461 being concave in a paraxial region thereof andan image-side surface 462 being convex in a paraxial region thereof. Thesixth lens element 460 is made of plastic material and has theobject-side surface 461 and the image-side surface 462 being bothaspheric.

The seventh lens element 470 with negative refractive power has anobject-side surface 471 being concave in a paraxial region thereof andan image-side surface 472 being concave in a paraxial region thereof.The seventh lens element 470 is made of plastic material and has theobject-side surface 471 and the image-side surface 472 being bothaspheric. Furthermore, the image-side surface 472 of the seventh lenselement 470 includes at least one convex shape in an off-axial regionthereof.

The IR-cut filter 480 is made of glass material and located between theseventh lens element 470 and the image surface 490, and will not affectthe focal length of the optical lens assembly.

The detailed optical data of the 4th embodiment are shown in TABLE 7 andthe aspheric surface data are shown in TABLE 8 below.

TABLE 7 4th Embodiment f = 4.65 mm, Fno = 2.08, HFOV = 41.0 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.263   2 Lens 1 2.274 ASP 0.522Plastic 1.544 55.9 7.87 3 4.460 ASP 0.094 4 Lens 2 11.801 ASP 0.270Plastic 1.639 23.5 −15.61 5 5.357 ASP 0.103 6 Lens 3 2.083 ASP 0.334Plastic 1.544 55.9 24.00 7 2.338 ASP 0.247 8 Lens 4 7.482 ASP 0.555Plastic 1.544 55.9 4.50 9 −3.540 ASP 0.058 10 Lens 5 −11.839 ASP 0.300Plastic 1.583 30.2 −6.55 11 5.697 ASP 0.523 12 Lens 6 −40.234 ASP 0.854Plastic 1.544 55.9 3.37 13 −1.765 ASP 0.359 14 Lens 7 −17.961 ASP 0.600Plastic 1.544 55.9 −2.49 15 1.483 ASP 0.600 16 IR-cut filter Plano 0.175Glass 1.517 64.2 — 17 Plano 0.405 18 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 8 Aspheric Coefficients Surface # 2 3 4 5 6 7 8 k= −8.7323E−01−1.9130E+01  0.0000E+00 −1.0000E+00 −4.1435E+00 −5.4992E−01  3.0000E+00A4= −1.1734E−02 −1.0016E−01 −9.1606E−02 −1.7159E−02 −9.7813E−03−4.1397E−02 −2.0861E−02 A6=  1.8456E−02  6.9928E−02  9.0852E−02 3.3351E−02 −1.2657E−02  2.1559E−04  1.0443E−04 A8= −1.1939E−02−1.7926E−02 −3.6121E−02 −2.5730E−02 −1.0476E−02 −1.1053E−02 −1.8913E−03A10= −6.7191E−03 −1.0134E−02 −4.0290E−03  4.1753E−03  7.5336E−05−1.9925E−04 −1.7405E−03 A12=  1.3577E−02  1.4283E−02  9.3199E−03−2.9051E−03 −2.7526E−04 A14= −5.5323E−03 −8.0878E−03 −5.4479E−03 1.1446E−03  4.1054E−04 Surface # 9 10 11 12 13 14 15 k= −2.0000E+01 4.5399E+00 −1.0000E+00 −2.0000E+01 −9.2826E+00 −1.1322E+00 −6.9816E+00A4= 2.8898E−02 8.4936E−02 −9.3921E−04  3.1408E−02 −4.1472E−02−6.3851E−02 −3.4980E−02 A6= −5.3809E−02  −1.1335E−01  −2.8576E−02−2.8355E−03  7.2284E−02  2.2900E−02  8.7373E−03 A8= 9.7815E−036.8806E−02  2.0885E−02 −1.6457E−02 −4.7761E−02 −9.1577E−03 −1.8446E−03A10= 1.3734E−03 −2.7897E−02  −7.5004E−03  9.9850E−03  1.5623E−02 2.0775E−03  2.2861E−04 A12= 1.5088E−04 7.9085E−03  1.6263E−03−3.0831E−03 −2.8160E−03 −2.1134E−04 −1.5312E−05 A14= 1.8887E−04−1.1445E−03  −1.7572E−04  3.5973E−04  2.1718E−04  7.8780E−06  4.2238E−07

In the 4th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment andthe 2nd embodiment with corresponding values for the 4th embodiment, soan explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 7 and TABLE 8 asthe following values and satisfy the following conditions:

4th Embodiment f (mm) 4.65 TL/ImgH 1.46 Fno 2.08 |Sag52|/CT5 0.50 HFOV(deg.) 41.0 Yc32/Yc72 0.65 tan(HFOV) 0.87 R11/f −8.65 V2 + V5 53.7 R14/f0.32 Sd/Td 0.95 (R13 + R14)/(R13 − R14) 0.85 Td/EPD 2.16 f/f345 0.55Td/ΣCT 1.40 f/ImgH 1.13 CT6/CT7 1.42

5th Embodiment

FIG. 9 is a schematic view of an image capturing apparatus according tothe 5th embodiment of the present disclosure. FIG. 10 shows, in orderfrom left to right, spherical aberration curves, astigmatic field curvesand a distortion curve of the image capturing apparatus according to the5th embodiment. In FIG. 9, the image capturing apparatus includes theoptical lens assembly (its reference numeral is omitted) and an imagesensor 595. The optical lens assembly includes, in order from an objectside to an image side, an aperture stop 500, a first lens element 510, asecond lens element 520, a third lens element 530, a fourth lens element540, a fifth lens element 550, a sixth lens element 560, a seventh lenselement 570, an IR-cut filter 580 and an image surface 590. The imagesensor 595 is disposed on the image surface 590 of the optical lensassembly. The optical lens assembly has a total of seven lens elements(510-570) with refractive power. Moreover, there is an air gap on theoptical axis between every two of the first lens element 510, the secondlens element 520, the third lens element 530, the fourth lens element540, the fifth lens element 550, the sixth lens element 560 and theseventh lens element 570 that are adjacent to each other.

The first lens element 510 with positive refractive power has anobject-side surface 511 being convex in a paraxial region thereof and animage-side surface 512 being concave in a paraxial region thereof. Thefirst lens element 510 is made of plastic material and has theobject-side surface 511 and the image-side surface 512 being bothaspheric.

The second lens element 520 with negative refractive power has anobject-side surface 521 being convex in a paraxial region thereof and animage-side surface 522 being concave in a paraxial region thereof. Thesecond lens element 520 is made of plastic material and has theobject-side surface 521 and the image-side surface 522 being bothaspheric.

The third lens element 530 with negative refractive power has anobject-side surface 531 being convex in a paraxial region thereof and animage-side surface 532 being concave in a paraxial region thereof. Thethird lens element 530 is made of plastic material and has theobject-side surface 531 and the image-side surface 532 being bothaspheric.

The fourth lens element 540 with positive refractive power has anobject-side surface 541 being convex in a paraxial region thereof and animage-side surface 542 being convex in a paraxial region thereof. Thefourth lens element 540 is made of plastic material and has theobject-side surface 541 and the image-side surface 542 being bothaspheric.

The fifth lens element 550 with negative refractive power has anobject-side surface 551 being concave in a paraxial region thereof andan image-side surface 552 being concave in a paraxial region thereof.The fifth lens element 550 is made of plastic material and has theobject-side surface 551 and the image-side surface 552 being bothaspheric.

The sixth lens element 560 with positive refractive power has anobject-side surface 561 being concave in a paraxial region thereof andan image-side surface 562 being convex in a paraxial region thereof. Thesixth lens element 560 is made of plastic material and has theobject-side surface 561 and the image-side surface 562 being bothaspheric.

The seventh lens element 570 with negative refractive power has anobject-side surface 571 being concave in a paraxial region thereof andan image-side surface 572 being concave in a paraxial region thereof.The seventh lens element 570 is made of plastic material and has theobject-side surface 571 and the image-side surface 572 being bothaspheric. Furthermore, the image-side surface 572 of the seventh lenselement 570 includes at least one convex shape in an off-axial regionthereof.

The IR-cut filter 580 is made of glass material and located between theseventh lens element 570 and the image surface 590, and will not affectthe focal length of the optical lens assembly.

The detailed optical data of the 5th embodiment are shown in TABLE 9 andthe aspheric surface data are shown in TABLE 10 below.

TABLE 9 5th Embodiment f = 4.77 mm, Fno = 2.08, HFOV = 40.2 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.240   2 Lens 1 2.640 ASP 0.567Plastic 1.544 55.9 5.74 3 15.733 ASP 0.058 4 Lens 2 46.280 ASP 0.270Plastic 1.608 25.7 −16.18 5 8.093 ASP 0.183 6 Lens 3 2.446 ASP 0.185Plastic 1.608 25.7 −87.48 7 2.271 ASP 0.290 8 Lens 4 19.686 ASP 0.660Plastic 1.544 55.9 5.31 9 −3.345 ASP 0.053 10 Lens 5 −13.940 ASP 0.300Plastic 1.608 25.7 −7.38 11 6.673 ASP 0.492 12 Lens 6 −40.234 ASP 0.946Plastic 1.544 55.9 3.32 13 −1.745 ASP 0.451 14 Lens 7 −10.057 ASP 0.600Plastic 1.514 56.8 −2.57 16 1.550 ASP 0.600 16 IR-cut filter Plano 0.175Glass 1.517 64.2 — 17 Plano 0.472 18 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 10 Aspheric Coefficients Surface # 2 3 4 5 6 7 8 k= −4.3271E−01−1.0144E+01  0.0000E+00 −1.0000E+00 −6.8347E+00 −2.2884E+00 −1.9782E+01A4= −6.7360E−03 −9.6166E−02 −8.9886E−02 −2.5711E−02 −3.1998E−02−5.5759E−02 −2.5055E−02 A6=  1.1231E−02  7.9768E−02  1.0015E−01 2.8035E−02 −2.0165E−02  1.6019E−03  1.1191E−03 A8= −1.2117E−02−1.6616E−02 −3.5570E−02 −2.2133E−02 −6.6237E−03 −8.9913E−03 −1.0895E−03A10= −4.3429E−03 −1.5309E−02 −4.2800E−03  5.5664E−03 −1.1782E−03 1.7552E−03 −2.4391E−04 A12=  1.3157E−02  1.6502E−02  8.5799E−03−3.1647E−03  1.9517E−04 A14= −5.5323E−03 −8.0878E−03 −5.4479E−03 5.8623E−04  4.3996E−05 Surface # 9 10 11 12 13 14 15 k= −2.0000E+01−1.2279E+01 −1.0000E+00 −7.4621E+00 −6.1424E+00 −1.1322E+00 −6.0560E+00A4=  2.4901E−02  8.7468E−02 −1.4278E−03  3.6249E−02 −8.3522E−04−2.8848E−02 −2.9529E−02 A6= −5.6742E−02 −1.1241E−01 −3.0796E−02−2.1733E−02  1.1932E−02 −1.3697E−02  4.1553E−03 A8=  1.0915E−02 6.7537E−02  2.0747E−02 −3.3241E−04 −1.1756E−02  5.3934E−03 −3.9542E−04A10=  1.4093E−03 −2.8202E−02 −7.4854E−03  1.2866E−03  3.3281E−03−9.0001E−04  1.6252E−05 A12= −1.5342E−04  7.9735E−03  1.6382E−03−2.8909E−04 −4.1769E−04  1.0536E−04 −2.1557E−07 A14= −7.6618E−06−1.0523E−03 −1.6140E−04  1.9534E−05  2.3168E−05 −5.9314E−06  2.4365E−09

In the 5th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment andthe 2nd embodiment with corresponding values for the 5th embodiment, soan explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 9 and TABLE 10as the following values and satisfy the following conditions:

5th Embodiment f (mm) 4.77 TL/ImgH 1.54 Fno 2.08 |Sag52|/CT5 0.28 HFOV(deg.) 40.2 Yc32/Yc72 0.61 tan(HFOV) 0.85 R11/f −8.43 V2 + V5 51.4 R14/f0.32 Sd/Td 0.95 (R13 + R14)/(R13 − R14) 0.73 Td/EPD 2.20 f/f345 0.22Td/ΣCT 1.43 f/ImgH 1.16 CT6/CT7 1.58

6th Embodiment

FIG. 11 is a schematic view of an image capturing apparatus according tothe 6th embodiment of the present disclosure. FIG. 12 shows, in orderfrom left to right, spherical aberration curves, astigmatic field curvesand a distortion curve of the image capturing apparatus according to the6th embodiment. In FIG. 11, the image capturing apparatus includes theoptical lens assembly (its reference numeral is omitted) and an imagesensor 695. The optical lens assembly includes, in order from an objectside to an image side, a first lens element 610, an aperture stop 600, asecond lens element 620, a third lens element 630, a fourth lens element640, a fifth lens element 650, a sixth lens element 660, a seventh lenselement 670, an IR-cut filter 680 and an image surface 690. The imagesensor 695 is disposed on the image surface 690 of the optical lensassembly. The optical lens assembly has a total of seven lens elements(610-670) with refractive power. Moreover, there is an air gap on theoptical axis between every two of the first lens element 610, the secondlens element 620, the third lens element 630, the fourth lens element640, the fifth lens element 650, the sixth lens element 660 and theseventh lens element 670 that are adjacent to each other.

The first lens element 610 with positive refractive power has anobject-side surface 611 being convex in a paraxial region thereof and animage-side surface 612 being concave in a paraxial region thereof. Thefirst lens element 610 is made of plastic material and has theobject-side surface 611 and the image-side surface 612 being bothaspheric.

The second lens element 620 with negative refractive power has anobject-side surface 621 being convex in a paraxial region thereof and animage-side surface 622 being concave in a paraxial region thereof. Thesecond lens element 620 is made of plastic material and has theobject-side surface 621 and the image-side surface 622 being bothaspheric.

The third lens element 630 with positive refractive power has anobject-side surface 631 being convex in a paraxial region thereof and animage-side surface 632 being concave in a paraxial region thereof. Thethird lens element 630 is made of plastic material and has theobject-side surface 631 and the image-side surface 632 being bothaspheric.

The fourth lens element 640 with positive refractive power has anobject-side surface 641 being concave in a paraxial region thereof andan image-side surface 642 being convex in a paraxial region thereof. Thefourth lens element 640 is made of plastic material and has theobject-side surface 641 and the image-side surface 642 being bothaspheric.

The fifth lens element 650 with negative refractive power has anobject-side surface 651 being convex in a paraxial region thereof and animage-side surface 652 being concave in a paraxial region thereof. Thefifth lens element 650 is made of plastic material and has theobject-side surface 651 and the image-side surface 652 being bothaspheric.

The sixth lens element 660 with positive refractive power has anobject-side surface 661 being concave in a paraxial region thereof andan image-side surface 662 being convex in a paraxial region thereof. Thesixth lens element 660 is made of plastic material and has theobject-side surface 661 and the image-side surface 662 being bothaspheric.

The seventh lens element 670 with negative refractive power has anobject-side surface 671 being concave in a paraxial region thereof andan image-side surface 672 being concave in a paraxial region thereof.The seventh lens element 670 is made of plastic material and has theobject-side surface 671 and the image-side surface 672 being bothaspheric. Furthermore, the image-side surface 672 of the seventh lenselement 670 includes at least one convex shape in an off-axial regionthereof.

The JR-cut filter 680 is made of glass material and located between theseventh lens element 670 and the image surface 690, and will not affectthe focal length of the optical lens assembly.

The detailed optical data of the 6th embodiment are shown in TABLE 11and the aspheric surface data are shown in TABLE 12 below.

TABLE 11 6th Embodiment f = 4.77 mm, Fno = 2.15, HFOV = 40.2 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 2.607 ASP 0.456 Plastic 1.544 55.9 6.462 9.345 ASP 0.000 3 Ape. Stop Plano 0.050 4 Lens 2 6.831 ASP 0.300Plastic 1.639 23.5 −14.41 5 3.871 ASP 0.229 6 Lens 3 2.637 ASP 0.300Plastic 1.544 55.9 44.04 7 2.842 ASP 0.339 8 Lens 4 −74.312 ASP 0.666Plastic 1.544 55.9 5.24 9 −2.768 ASP 0.084 10 Lens 5 23.953 ASP 0.300Plastic 1.608 25.7 −7.78 11 3.962 ASP 0.488 12 Lens 6 −20.599 ASP 0.855Plastic 1.544 55.9 3.41 13 −1.732 ASP 0.365 14 Lens 7 −17.811 ASP 0.628Plastic 1.530 55.8 −2.55 15 1.485 ASP 0.600 16 IR-cut filter Plano 0.175Glass 1.519 64.2 — 17 Plano 0.471 18 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 12 Aspheric Coefficients Surface # 1 2 4 5 6 7 8 k= −5.5297E−01−1.0144E+01  0.0000E+00 −1.0000E+00 −8.2814E+00 −9.4280E−01 3.0000E+00A4= −7.6032E−03 −9.6166E−02 −8.9886E−02 −3.3265E−02 −1.9225E−02−4.6633E−02 −1.8572E−02  A6=  7.4994E−03  7.4991E−02  8.7448E−02 3.4062E−02 −1.1578E−02 −2.4536E−03 1.1814E−02 A8= −1.0763E−02−2.9490E−02 −3.9773E−02 −2.5969E−02 −1.0501E−02 −7.0138E−03 −2.4444E−02 A10= −5.9447E−03 −1.6013E−02 −2.4637E−03  1.1977E−02  1.0671E−03 5.4507E−04 1.5649E−02 A12=  1.1968E−02  2.1483E−02  1.3457E−02−3.1647E−03 −4.3388E−03  A14= −5.5323E−03 −8.0878E−03 −5.4479E−03−3.6061E−06 3.9678E−04 Surface # 9 10 11 12 13 14 15 k= −1.2675E+01−1.0000E+00 −1.0000E+00 3.0000E+00 −5.9448E+00 −1.1322E+00 −5.8392E+00A4=  2.4901E−02  8.0628E−02 −1.4278E−03 5.7584E−02  3.0406E−02−1.8460E−02 −2.9727E−02 A6= −5.8431E−02 −1.1321E−01 −3.4217E−02−3.2215E−02  −5.0596E−03 −2.2846E−02  3.6302E−03 A8=  1.2593E−02 6.6286E−02  2.0461E−02 2.7724E−04 −1.1199E−02  6.8102E−03 −2.4555E−04A10=  1.5606E−03 −2.8482E−02 −7.4740E−03 3.6952E−03  6.4952E−03−4.4162E−04 −4.8613E−06 A12= −3.3702E−04  8.0051E−03  1.6525E−03−1.2301E−03  −1.0511E−03 −3.3555E−05  1.3839E−06 A14= −5.3848E−05−1.0142E−03 −1.5861E−04 1.2432E−04  7.6673E−05  3.6617E−06 −4.4656E−08

In the 6th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment andthe 2nd embodiment with corresponding values for the 6th embodiment, soan explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 11 and TABLE 12as the following values and satisfy the following conditions:

6th Embodiment f (mm) 4.77 TL/ImgH 1.54 Fno 2.15 |Sag52|/CT5 0.34 HFOV(deg.) 40.2 Yc32/Yc72 0.61 tan(HFOV) 0.85 R11/f −4.32 V2 + V5 49.2 R14/f0.31 Sd/Td 0.91 (R13 + R14)/(R13 − R14) 0.85 Td/EPD 2.28 f/f345 0.42Td/ΣCT 1.44 f/ImgH 1.16 CT6/CT7 1.36

7th Embodiment

FIG. 16 shows an electronic device 10 according to the 7th embodiment ofthe present disclosure. The electronic device 10 of the 7th embodimentis a smart phone, wherein the electronic device 10 includes an imagecapturing apparatus 11. The image capturing apparatus 11 includes anoptical lens assembly (its reference numeral is omitted) according tothe present disclosure and an image sensor (its reference numeral isomitted), wherein the image sensor is disposed on an image surface ofthe optical lens assembly.

8th Embodiment

FIG. 17 shows an electronic device 20 according to the 8th embodiment ofthe present disclosure. The electronic device 20 of the 8th embodimentis a tablet personal computer, wherein the electronic device 20 includesan image capturing apparatus 21. The image capturing apparatus 21includes an optical lens assembly (its reference numeral is omitted)according to the present disclosure and an image sensor (its referencenumeral is omitted), wherein the image sensor is disposed on an imagesurface of the optical lens assembly.

9th Embodiment

FIG. 18 shows an electronic device 30 according to the 9th embodiment ofthe present disclosure. The electronic device 30 of the 9th embodimentis a head-mounted display, wherein the electronic device 30 includes animage capturing apparatus 31. The image capturing apparatus 31 includesan optical lens assembly (its reference numeral is omitted) according tothe present disclosure and an image sensor (its reference numeral isomitted), wherein the image sensor is disposed on an image surface ofthe optical lens assembly.

The foregoing description, for purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTABLES 1-12 show different data of the different embodiments; however,the data of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. An optical lens assembly comprising, in orderfrom an object side to an image side: a first lens element, a secondlens element, a third lens element, a fourth lens element, a fifth lenselement, a sixth lens element and a seventh lens element; wherein thesecond lens element has negative refractive power; the seventh lenselement has an image-side surface being concave in a paraxial regionthereof and comprising at least one convex shape in an off-axis regionthereof, and an object-side surface and the image-side surface of theseventh lens element are both aspheric; wherein a total number of lenselements in the optical lens assembly is seven; an absolute value of afocal length of the first lens element is smaller than an absolute valueof a focal length of the fifth lens element; an absolute value of afocal length of the sixth lens element is smaller than an absolute valueof a focal length of the third lens element; wherein an axial distancebetween an object-side surface of the first lens element and theimage-side surface of the seventh lens element is Td, an entrance pupildiameter of the optical lens assembly is EPD, an axial distance betweenthe object-side surface of the first lens element and an image surfaceis TL, a maximum image height of the optical lens assembly is ImgH, acurvature radius of the image-side surface of the seventh lens elementis R14, a focal length of the optical lens assembly is f, and thefollowing conditions are satisfied:Td/EPD<3.20;TL/ImgH≤1.54; and0<R14/f<0.60.
 2. The optical lens assembly of claim 1, wherein the fifthlens element has negative refractive power, the sixth lens element haspositive refractive power, and the seventh lens element has negativerefractive power.
 3. The optical lens assembly of claim 1, wherein thefirst lens element has positive refractive power, the first lens elementhas an image-side surface being concave in a paraxial region thereof;the fourth lens element has positive refractive power.
 4. The opticallens assembly of claim 1, wherein the sixth lens element has anobject-side surface being concave in a paraxial region thereof; acurvature radius of the object-side surface of the sixth lens element isR11, the focal length of the optical lens assembly is f, and thefollowing condition is satisfied:R11/f<0.
 5. The optical lens assembly of claim 1, wherein the third lenselement has an image-side surface being concave in a paraxial regionthereof and comprising at least one convex shape in an off-axis regionthereof, and an object-side surface and the image-side surface of thethird lens element are both aspheric.
 6. The optical lens assembly ofclaim 1, wherein the axial distance between the object-side surface ofthe first lens element and the image-side surface of the seventh lenselement is Td, a sum of central thicknesses of the first lens element,the second lens element, the third lens element, the fourth lenselement, the fifth lens element, the sixth lens element and the seventhlens element is ΣCT, and the following condition is satisfied:1.0<Td/ΣCT<1.45.
 7. The optical lens assembly of claim 1, wherein thecurvature radius of the image-side surface of the seventh lens elementis R14, the focal length of the optical lens assembly is f, and thefollowing condition is satisfied:0<R14/f≤0.32.
 8. The optical lens assembly of claim 1, wherein the focallength of the optical lens assembly is f, the maximum image height ofthe optical lens assembly is ImgH, and the following condition issatisfied:f/ImgH≤1.16.
 9. The optical lens assembly of claim 1, wherein the focallength of the optical lens assembly is f, a composite focal length ofthe third lens element, the fourth lens element and the fifth lenselement is f345, and the following condition is satisfied:0<f/f345≤0.42.
 10. The optical lens assembly of claim 1, furthercomprising: an aperture stop, wherein an axial distance between theaperture stop and the image-side surface of the seventh lens element isSd, an axial distance between the object-side surface of the first lenselement and the image-side surface of the seventh lens element is Td,and the following condition is satisfied:0.91≤Sd/Td<1.0.
 11. An image capturing apparatus, comprising: theoptical lens assembly of claim 1; and an image sensor disposed on theimage surface of the optical lens assembly.
 12. An electronic device,comprising: the image capturing apparatus of claim
 11. 13. An opticallens assembly comprising, in order from an object side to an image side:a first lens element, a second lens element, a third lens element, afourth lens element, a fifth lens element, a sixth lens element and aseventh lens element; wherein the second lens element has negativerefractive power; the third lens element has negative refractive power;the seventh lens element has an image-side surface being concave in aparaxial region thereof and comprising at least one convex shape in anoff-axis region thereof, and an object-side surface and the image-sidesurface of the seventh lens element are both aspheric; wherein theoptical lens assembly further comprises an aperture stop disposed on anobject side of the first lens element; a total number of lens elementsin the optical lens assembly is seven; wherein an axial distance betweenan object-side surface of the first lens element and the image-sidesurface of the seventh lens element is Td, an entrance pupil diameter ofthe optical lens assembly is EPD, an axial distance between theobject-side surface of the first lens element and an image surface isTL, a maximum image height of the optical lens assembly is ImgH, and thefollowing conditions are satisfied:Td/EPD<3.20; andTL/ImgH≤1.54.
 14. The optical lens assembly of claim 13, wherein thesecond lens element has an object-side surface being convex in aparaxial region thereof and an image-side surface being concave in aparaxial region thereof; the third lens element has an object-sidesurface being convex in a paraxial region thereof and an image-sidesurface being concave in a paraxial region thereof.
 15. The optical lensassembly of claim 13, wherein the first lens element has positiverefractive power, the sixth lens element has positive refractive power,and the seventh lens element has negative refractive power; wherein anaxial distance between the aperture stop and the image-side surface ofthe seventh lens element is Sd, an axial distance between theobject-side surface of the first lens element and the image-side surfaceof the seventh lens element is Td, and the following condition issatisfied:0.80<Sd/Td<1.0.
 16. The optical lens assembly of claim 13, wherein anaxial distance between the aperture stop and the image-side surface ofthe seventh lens element is Sd, an axial distance between theobject-side surface of the first lens element and the image-side surfaceof the seventh lens element is Td, and the following condition issatisfied:0.95≤Sd/Td<1.0.
 17. The optical lens assembly of claim 13, wherein afocal length of the optical lens assembly is f, the maximum image heightof the optical lens assembly is ImgH, and the following condition issatisfied:f/ImgH≤1.16.
 18. The optical lens assembly of claim 13, wherein an Abbenumber of the second lens element is V2, an Abbe number of the fifthlens element is V5, and the following condition is satisfied:30<V2+V5<85.
 19. The optical lens assembly of claim 13, wherein an Abbenumber of the second lens element is V2, an Abbe number of the fifthlens element is V5, and the following condition is satisfied:30<V2+V5≤51.4.
 20. The optical lens assembly of claim 13, wherein afocal length of the optical lens assembly is f, a composite focal lengthof the third lens element, the fourth lens element and the fifth lenselement is f345, and the following condition is satisfied:0<f/f345<1.0.
 21. The optical lens assembly of claim 13, wherein acurvature radius of the object-side surface of the seventh lens elementis R13, a curvature radius of the image-side surface of the seventh lenselement is R14, and the following condition is satisfied:0.73≤(R13+R14)/(R13−R14).
 22. The optical lens assembly of claim 13,wherein a vertical distance between a non-axial critical point closestto the image surface in an off-axis region on an image-side surface ofthe third lens element and an optical axis is Yc32, a vertical distancebetween a non-axial critical point closest to the image surface in anoff-axis region on the image-side surface of the seventh lens elementand the optical axis is Yc72, and the following condition is satisfied:0.3<Yc32/Yc72<0.75.